A day ago, the plan to expel the undead through the volcano was conceived spontaneously.
But after confirming that volcanic ash could purify low-level undead and weaken high-level ones, Xue Dili vaguely developed a further idea of using the volcano to eradicate the undead.
Since the Holy Mountain is considered the Divine King in the Empire's mythology, the ultimate nemesis of all evil and death, then in this otherworld filled with magic and divine arts, could the power the clerics wield be the geothermal energy of the volcano?
Furthermore, what would happen if you were to throw the absolutely undead Witch Demon King into the volcano?
Either the Witch Demon King, this catastrophic creature, would be purified by a more powerful catastrophe—the volcano.
Or, the Witch Demon King would get trapped in a cycle of continuous purification and resurrection within the volcano, akin to a permanent seal, ceasing its thoughts.
There is another possibility, that the Witch Demon King could adapt to the volcano's temperature and mystery, then return to the earth like some ultimate creature.
But if throwing it into the volcano doesn't kill the Witch Demon King, then there is truly no solution—this world should just wash its hands and sleep, there is no hope, only awaiting death.
Thus, Xue Dili opted for a final gamble, betting that this volcano, or rather the Supreme God of the Church Court in the Empire's mythology, the God of the Holy Mountain, could kill or seal the Witch Demon King!
All in!
All in is a kind of wisdom.
Furthermore, considering the Witch Demon King's retreat when he first released volcanic ash, his bet has already been won.
Next, it is about how to deceive the Witch Demon King onto the table!
The Skeleton Demon clung tightly to the Witch Demon King, constantly adjusting its attack direction, forcibly pushing the Witch Demon King toward the volcano.
In the distance, the Holy Knights besieging the Undead Giant Beasts noticed the Skeleton Demon and Witch Demon Kings' battlefield getting increasingly distant and progressively moved toward the volcano, with all surrounding trees being destroyed, leaving the ground scarred as if insulted and abused.
"Pope! That battlefield has already reached the range of the Holy Mountain!" remarked a Holy Knight.
The Female Pope looked toward that direction, witnessing the explosions and sword qi strikes occurring endlessly at the foot of the Holy Mountain.
Seeing the Holy Mountain emitting black smoke, Alola immediately recalled the old undead explaining Xue Dili's idea of triggering the volcano.
"Could it be..." Instantly realizing something, the Female Pope shouted, "Dispatch 5 teams to intercept the Bone Dragon! The rest will follow me to the main battlefield!"
The next moment, several squads of Holy Knights, empowered by unicorn warhorses, headed toward the area where the Skeleton Demon and Witch Demon King fought.
Riding on the galloping warhorse, a terrifying thought emerged in Alola's mind.
Could the child be planning to throw the Witch Demon King into the Holy Mountain!
No, it's impossible, the Witch Demon King isn't foolish, and the undead naturally fears the Holy Mountain, the Witch Demon King would never easily approach its summit!
As she anticipated, the Witch Demon King began acting erratically upon reaching the Holy Mountain's base.
Almost like sensing danger, it no longer retreated toward the volcano, no matter what attack Xue Dili used, it stopped avoiding the mountain's summit but instead started circling around.
Xue Dili looked above, seeing the distance to the crater was still at least ten kilometers away.
Not enough!
"Old one, later, you control the right hand with Imperial Swordsmanship, I'll control the left hand to unleash the Holy Light Spiral Pill!" Xue Dili instructed.
"Alright!" The old undead no longer considered escape.
In the next instant, the Witch Demon King noticed something entirely different.
If before the Skeleton Demon appeared to be a single entity, at this moment, the Skeleton Demon wielded a sword with its right hand while continuously casting divine arts with its left.
It instantly felt as if facing not one person but a simultaneous pincer attack from two legendary levels.
"Holy Light Technique!" Xue Dili began chanting in Imperial Language.
Surging energy poured into the holy light ball in its left hand, while its right hand executed Imperial Swordsmanship unhindered, attacking the Witch Demon King.
"No, instinct drives the undead to fear the Holy Mountain, so it will attempt to flee downward!" shouted the old undead.
In the next moment, dozens of Holy Light Spears shot up from below, once again piercing the Witch Demon King's mummified body, sizzling like branding irons on the mummy.
"Ugh... Ah!"
The Witch Demon King groaned in pain, as the Holy Light directly purified the souls of the undead.
A spontaneously conjured bone spike penetrated the Holy Knight Order, forming a grim line of bloodstains and remnants, yet no Holy Knight stepped back or felt fear, their eyes brimming with endless rage against the Witch Demon King, a fury seemingly intended to burn it to ashes.
The Holy Light Spears were again shot in unison, piercing the mummy some more; as the Witch Demon King prepared to cast an even mightier undead magic, a roaring giant sword targeted its head from behind.
"Buzz!"
The massive Demon Sword slammed the Witch Demon King, crashing into the side of the Holy Mountain, bouncing upward like a ping-pong ball toward its summit.
The Skeleton Demon spread its wings, dashing desperately toward the Witch Demon King's direction.
"To the mountain! To the mountain! To the mountain!"
Alola's voice grew hoarse, yet she continued directing the Holy Knight Order to the summit.
"He's starting to feel fear!" Xue Dili noticed that the Witch Demon King, now this mummified figure, was attempting to distance itself from the Holy Mountain, seemingly recognizing its imminent danger.
But Xue Dili wouldn't let it have its way!
The great sword slammed it hard, compelling the Witch Demon King to evade; if struck fully, it would again be hurtled, bringing it closer to the summit.
Yet, the Witch Demon King forgot that it wasn't battling a single person; with its other hand, Xue Dili's long-charged Holy Light Ball, now about half a meter in diameter, pressed firmly against the mummy's chest on its evasion path...
In the consciousness space, Xue Dili extended his right fist, met by the old undead's left fist in sync.
The two fists collided!
"Buzz!"
An endless eruption of Holy Light, inexhaustible light and heat melted the Skeleton Demon's left hand and blew apart the Witch Demon King's mummified chest, hurling it firmly toward the Holy Mountain.
"You deserve to die!" The Witch Demon King roared, now less than 3 kilometers from the crater. Driven by instinct, it too began fighting for survival.
The Skeleton Demon flapped its bony wings, charging.
The Witch Demon King fired off its fingers like sniper bullets, utilizing its own body as casting material for instant undead magic, each finger surpassing the previous bone spear in speed.
However, the Skeleton Demon did not dodge or evade, enduring the bone spears that shattered its bones, with its left hand previously melted by the Holy Light Ball yet to recover, only its right hand remained, clutching the Witch Demon King tightly.
The Witch Demon King detonated its arm, instantly destroying the Skeleton Demon's solitary intact right hand.
Despite this, the gigantic Skeleton Demon opened its mouth, biting onto the Witch Demon King, and desperately headed toward the volcano's crater.
"Boy! What are you doing!" the old undead hollered.
"The Witch Demon King, it can fly!" laughed Xue Dili as its bony wings flapped. Ignoring the Witch Demon King's desperate struggle in its mouth, it soared towards the summit: "Old one, thank you for accompanying my madness one last time."
In the consciousness space, Xue Dili's eyeball dropped to the ground, having completely succumbed to undead transformation, with the Soul Fire weakly burning within the hollow eye socket.
"Besides, I've been quite satisfied with this journey in the otherworld."
"Goodbye..."
The charging Holy Knights only saw the Sanctified Skeleton Demon's final flight, and in the next moment, witnessed the Skeleton Demon, under the gaze of the Holy Knights and the Female Pope, charging into the volcano!
"Boom!"
A colossal earthquake of over magnitude eight erupted from the volcano, spewing lava and black smoke into the sky!
Scorching lava engulfed the two undead; in the midst of magma, the Witch Demon King roared in agony, died, resurrected, and died again...
Just as Xue Dili had imagined.
It couldn't escape the magma, almost as if countless large hands beneath were grabbing it tightly, and in the cycles of death and resurrection, the Witch Demon King gradually ceased its thinking...